Machine for making bronze-powder.



No. s|,447. Paiented AAug; 27, lsol. 'm. J. FucHs.

MACHINE FDR MAKING BBUNZE PWDER (Application led Apr. 17, 1901.)

3 Sheets-Sheet l.

(No Model.)

'Ill' www l INYEIESK @ik @wf N0. 63|,447. Paiented Aug. 27, |901.

M. J. FUCHS.

MACHINE FOB MAKING BRONZE POWDER.

(Applicatinn filed Apr. 17, 1901.)

3 Sheets-Sheet 2,

(No Mudel.)

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.MII 71 WITNESSES. g@ @f Tm: Nonms PEYERS co. PHOYKLLITHO.. wasmNumN. n c.

l3 Sheets-Sheet 3.

Patented Aug. 27, |90I.

M. J. FUCHS.

MACHINE FOB MAKING BRONZE POWDER.

(Application flied Apr. 17, 1901.)

No. 68I,447.

(No Model.)

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UNITED STATES 'PATENT FFICE.

MAXIMILIAN J. FUCHS, OF STAMFORD, CONNECTICUT.

IVIACHINE'FOR MAKING BRONZE-POWDER.

SPECIFICATION forming part of Letters Patent No. 681,447, dated August 27, 1901.

Application filed April 17, 1901. Serial No. 56,235. (No model.)

To a/ZZ whom it may concern:

Be it known that I, MAXIMILIAN J. FUCHS, a lcitizen of the United States, and a resident -of Stamford, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Machines for Making Bronze-Powder, of which the following is a specification.

My invention relates to an automatic machine for making bronze-powder, it being an improvement on the patent granted to me April 10, 1900, No. 647 ,081. In this patent the mortars were constructed to make only the ordinary kind of bronze-powder. What is commercially known as bronze` powder is made from a specially prepared metal, which is rst reduced-as in fact, allI kinds of metals from which powder is to be made must be-into small particles and in a separate machine to about the size of coarse- This coarse material is then ground coffee.- fed into mortars'carrying beaters and in such quantities that a bed of sufficient depth is:

formed to enable the beaters to pass freely through and act on the small quantityofI metal lyingdirectly on the anvil. As soon as the particles thus lying on the anvil have been reduced sufficiently to make them lighter j than the unbeaten particles they 4fly to one side and gradually work their way to the top and center of the mass and are then forced Heretofore it had beeni the practice to place a certain quantity of; 'metal in the mortar and let Iit remain there down and rebeaten.

until the whole mass was reduced to the proper degree of neness required for bronzepowder.

Great care, however, had to be taken not to overstamp the mass or allow too much to accumulate in the mortar, or it wouldtity of metal therein. In-other words, the metal in the mortars could not exceed a certain depth in order to produce satisfactory results.

In my present improvement I have provided means whereby at least three grades of powder can be produced in the same mortars-viz., the ordinary bronze-powder and a finer and more expensive powder, which is made by restamping the ordinary commercial bronze-powder; also, a cheaper grade made from brass scrap. The first is of course produced by the construction shown in the above-named patent. In producing the second grade I provide a shield or guard to choke the mouth of the before-mentioned dischargeorifice, and thus prevent a too-free delivery.

In rebeatingbronze-powder to still further reduce it the treatment must necessarily differ. The bronze-powder, bulk for bulk, is vastly 'lighter than the metal from which said powder was originally made. Therefore the depth in the mortars must necessarily be increased in order to offer the proper resistance to the beaters. In other words, the mass must be of sufcient density to always keep some of the material between the anvils and the ends of the beater-rods, as otherwise the sudden blow between iron and iron would soon break the beaters. Therefore the powder is carried up in the mortars above the discharge-orifice from which it was originally allowed to escape, and such orifice will be so choked that the most that passes out will have been sufficiently rebeaten, and that portion not suiiiciently reduced will be returned, through the circulating process of the Inachine, again to the mortars.

In producing the third grade the conditions are entirely diiferent from that required for the other two, and if produced in the same mortars and by the same beaters as I propose the mass must be greatly reduced. The metal used is composed of scraps of brass or what is known as brass scrap, being the waste or scrap produced in forming articles of manufacture and heretofore considered impossible of being converted into powder by means of the ordinary beaters used in making bronzepowder. It being a much tougher and heavier metal, it is evident that the quantity placed in the mortars must be correspondingly re- IOO duced when the same beaters are to be used. So, too, the discharge-orifice must also be located with especial reference to this particular kind of metal. As the metal, before stated, is tougher, l have found from experience that the depth cannot greatly exceed two inches; otherwise the beaters that produce the ordinary bronze-powder will not penetrate it, and the depth should not fall much below one inch; otherwise there' will not be sufficient metal over the anvils to prevent the contact of iron and iron. As the finer particles after reduction will not rise in the mortars over about two inches, l have provided an eX- tra discharge-orifice at that point and have also provided means whereby such orifice may be closed when the other powders are being made.

To enable others to understand my invention, reference is had to the accompanying drawings, in which- Figure l represents a side elevation of an automatic machine with which my improvements are combined. Fig. 2 is a rear elevation of the mortars and broken view of their supporting-base and the worm-shaft on which the worm is mounted that conveys the powder discharged from the mortarsto the elevator. Fig. 3 is a rear elevation of the mortars with the cover that carries the worm conveyer removed; also, broken view of the slide for opening and closing the lower discharge orifices or outlets. Fig. 4 is a broken view, partly in section, ot' one of the mortars, beater-rods, and elevator. In this view the mortar is arranged to rcbeat bronze-powder. Fig. 5 is a broken sectional view of one ofthe mortarsl and broken View of one of the beaters, showing the mortar arranged to beat ordinary bronze-powder. Fig. 6 is a broken sectional view of one of the mortars and broken View of one of the beater-rods. In this view the mortar is arranged for beating brass scrap.

Its construction and operation are as follows:

, l and 2 represent the mortars, 3 the beaterrods, and 4 anges thereon to force the fine finished powder out through the dischargeorifice, presently to be described. u

9 is the hopper in which the metal is first placed.

10, Fig. 6, is one of two feed-worms placed at the bottom of said hopper for conveying the inetal therefrom to the mortars.

11 and 12 are the shafts on which said worms are mounted.

13 and 14 are sprocket-wheels on the outer ends of these shafts.

15 is a sprocket chain connecting said wheels- 16 is another sprocket-wheel on shaft l2, and 17 is a chain connecting said wheel with the sprocket-wheel 18 on shaft 19. This latter shaft carries at its opposite end the bevelgear 20, adapted to register with the bevelgear 21 on the worm-shaft 22. This shaft is i journaled both in the standard 23 and the cover 24.

25 is a worm on said shaft and within said cover for the purpose of conveying the powder discharged from the openings 26, 27, 28, and 29 to the spout 30, from whence it is discharged into the elevator 3l. (Shown at Figs. l and 4.)

32 is a tight, and 33 a loose, pulley mounted upon the main driving-shaft 34.

35 is a gear (see Fig. l) mounted on the opposite end of this shaft to register with the gear 36 on the shaft 37. These shafts carry the liftersthat operate the beater-rods.

38 -is a sprocket-wheel on the outside of gear 35, carrying the chain 39 to engage with the large sprocket-wheel 40 on the Worm-shaft on the before-m entioned worm-shaft 22. In this manner the several operative parts connected with the mortars are run.

4l is a cabinet into which the powder from the mortars is carried by means of the bucket elevator 3l, or, rather, 3l is the casing for the bucket elevator 42. (Shown at Fig. l.) This elevator is run through the medium of the small sprocket-wheel 43, Fig. 2, on worinshaft 22.

44 is the chain which connects this Wheel with the upper large sprocket-wheel 45 at the rear of the cabinet. This wheel is mounted on the shaft 46,which also carries the sprocket wheel 47,. v

48 is a sprocket-chain which connects said wheel with the sprocket-wheel 49 on the upper shaft 50. This shaft carries the wheel 51, Fig. l, within the elevator-case 3l.

52 is a rotary sieve within the cabinet and is mounted on the shaft 53. I

1 54 is a casing in which is journaled the short shaft 55, on which shaft s mounted within said' casing a worm, (not `shown,) which receives the powder from the elevator-buckets and deposits it through the spout 56 onto the worm 57, mounted on the sieve-shaft A53. This shaft is run by means of its bevel-gear 57, registering with the bevel-gear 58 on the shaft 46, while the Worm-shaft is run from the large gear 59, mounted on the shaft 50, registering with the pinion 60 on said worm-shaft. The powdered material that passes through the sieve is discharged into the `hopper 61 and from thence falls into the drawer 62, while the coarser product is reconveyed through the tube 63 back into the hopper 9 and from thence to the mortars to be rebeaten. The above description briefiy sets forth the automatic construction and arrangement of the machine.

64, Fig. 3, is a slide let into the rear face of the two mortars 1 and 2 and is provided with openings 65 and 66 to coincide with the lower discharge orifices or outlets 2S and 29 when said lower outlets are used for the discharge of powder produced from scrap-brass,as shown Ico IIO

at Figs. 2 and 6; but when the upper outlets bronze-powder or the finer grade of bronzepowder is being made, this slide is moved so as to close these lower outlets, as shown at Figs. 3, 4, and 5.

In Fig. 5 the outlet 26 is situated about four or four and three-eighths inches above the anvils 67, and the distance from the under side of the beater-rod anges 4 to the anvils is the same. This brings the lower edge of said flanges on a line with the lower lip of the opening 26 when the beaters rest on the anvils, and this distance cannot be materially varied or changed without injury to the 0rdinary bronze-powder.

In Fig. 6, where powder from brass scrap is being made, the distance from the lower lip of the outlet 2S to the anvils cannot materially vary from two inches, as the material is too heavy to rise above that point. Therefore it is necessary that this opening be so located that the ner particles can escape the danger of being overbeaten.

When the mortars are used to rebeat fine powder to a still liner grade, the slide 64 is of course closed, in which case (see Fig. 4) the powder,- as before mentioned,- must be deep enough to form a mass of sufficient density to be acted on by the mortars. Therefore this line powder will rise above the upper outlet 26, as shown. Now if this outlet was unobstructed this tine powder would be forced out before it could be properly treated. To prevent this and hold the powder in the mortars long enough to be beaten, the shields 68 and 69 (see also Figs. 2 and 3) are lowered so as to extend below the outlets 26 and 27, as shown at Fig. 4. The lower end of these shields stand away from the face of the mortars a distance sufficient to permit only the nished product of this tine mass to be forced out through these restricted openings. These shields have a vertical adjustment in the slots 70 and 7l and are secured by the bolts 72 and 7 3 in any of their adjusted positions, and when not required they are raised, as shown at Figs. 5 and 6.

From the foregoing description it will readily be seen that the scope of the machine is greatly extended, for instead of the machine being restricted to the production of one kind of powder, as formerly, I am able to make three distinct kinds in the same mortar, and thus avoid the expense of constructing three separate machines for this purpose.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The combination of a mortar having an outlet for the discharge of the ordinary in-V ished product, and an adjustable shield adapted to choke or restrict the free delivery ot' said outlet so that powder of different degrees of neness may be produced, substantially as described.

2. The combination of a mortar having a plurality of outlets, and a slide or gate for opening and closing the lower outlet so that the machine may be adjusted to produce coarse and ne powder, substantially as described.

3. In a bronze-powder machine, the combination of a mortar having a plurality of outlets one above the other, a shield to choke or restrict the free delivery from the upper outlet,- and a slide or gate for opening and closing the lower outlet whereby the machine may be adjusted for the production of more than two grades of powder, substantially as described.

Signed at Stamford, in the county of Fairfield and State of Connecticut, this 6th day of April, A. D. 1901.

MAXIMILIAN J. FUCHS. Witnesses:

ERNST MLLER, WM. WHITEHEAD. 

